阅读说明：本技术 一种具有除甲醛功效的乳胶墙漆添加剂及其制备方法 (Latex wall paint additive with formaldehyde removing effect and preparation method thereof ) 是由 不公告发明人 于 2020-05-27 设计创作，主要内容包括：本发明提供一种乳胶墙漆添加剂,特别涉及一种以羟丙基三甲基氯化铵壳聚糖和乙烯脲为除甲醛活性物质的水性乳胶墙漆添加剂。本发明公开的具有除甲醛功效的乳胶墙漆添加剂,其组分按重量百分比包括：羟丙基三甲基氯化铵壳聚糖10-20%,PEG-10000(聚乙二醇)3-7%,乙烯脲8-15%,氯化铵0.1-1%。本发明公开的具有除甲醛功效的乳胶墙漆添加剂其优点在于：所优选的除甲醛活性分子羟丙基三甲基氯化铵壳聚糖为绿色环保的天然产物衍生物；羟丙基三甲基氯化铵壳聚糖与乙烯脲的组合物除甲醛效率高；本发明所述的除甲醛墙漆添加剂与水性乳胶墙漆配伍性好,对原乳胶漆体系无毒副作用。(The invention provides a latex wall paint additive, and particularly relates to a water-based latex wall paint additive taking hydroxypropyl trimethyl ammonium chloride chitosan and ethylene urea as formaldehyde removal active substances. The invention discloses a latex wall paint additive with formaldehyde removing effect, which comprises the following components in percentage by weight: 10-20% of hydroxypropyl trimethyl ammonium chloride chitosan, 3-7% of PEG-10000 (polyethylene glycol), 8-15% of ethylene urea and 0.1-1% of ammonium chloride. The latex wall paint additive with the formaldehyde removing effect disclosed by the invention has the advantages that: the preferable formaldehyde-removing active molecule hydroxypropyl trimethyl ammonium chloride chitosan is a green and environment-friendly natural product derivative; the formaldehyde removal efficiency of the composition of hydroxypropyl trimethyl ammonium chloride chitosan and ethylene urea is high; the formaldehyde-removing wall paint additive has good compatibility with water-based latex wall paint, and has no toxic or side effect on the original latex paint system.)

1. A latex wall paint additive with formaldehyde removal effect comprises the following components in percentage by weight:

10-20% of hydroxypropyl trimethyl ammonium chloride chitosan;

3-7% of PEG-10000 (polyethylene glycol);

8-15% of ethylene urea;

0.1-1% of ammonium chloride;

57-78.9% of pure water.

2. The latex wall paint additive with formaldehyde removing effect according to claim 1, wherein the content of hydroxypropyl trimethyl ammonium chloride chitosan is 10-20% by weight, and most preferably 15% by weight.

3. The latex wall paint additive with formaldehyde removing effect according to claim 1, wherein the content of PEG-10000 (polyethylene glycol) is 3-7% by weight, and most preferably 5% by weight.

4. The latex wall paint additive with formaldehyde removing effect according to claim 1, wherein the content of the ethylene urea is 8-15% by weight, and most preferably 10% by weight.

5. The latex wall paint additive with formaldehyde removing effect according to claim 1, wherein the content of ammonium chloride is 0.1-1% by weight, and most preferably 0.5% by weight.

6. The latex wall paint additive with formaldehyde removing effect according to claim 1, wherein the pure water is deionized water.

Technical Field

The invention relates to the field of formaldehyde removal of building materials, in particular to a water-based emulsion paint additive taking hydroxypropyl trimethyl ammonium chloride chitosan and ethylene urea as formaldehyde removal active substances.

Background

Formaldehyde is commonly called as formil, is colorless and volatile toxic gas with irritation and asphyxiation, and has main effects on human health in aspects of abnormal smell, irritation, allergy, abnormal lung function, abnormal liver function, abnormal immune function and the like. Formaldehyde has been identified by the world health organization as a carcinogenic and teratogenic source of allergy, as a first class of carcinogens by the international agency for cancer (IARC), and as a priority list of toxic chemicals by our country. GB/T18883-2002 indoor air quality Standard stipulates that the concentration of formaldehyde in a building of one class is required to be less than 0.08 milligram per cubic meter, and the concentration of formaldehyde in a building of the second class is required to be less than 0.10 milligram per cubic meter.

At present, various potential formaldehyde release sources still pose serious threats to the health of people in the home decoration industry of China. In the decoration process, the home furnishing board is made of various wood boards which are prepared by taking urea-formaldehyde resin, phenolic resin and melamine resin as adhesives, and a large amount of residual free formaldehyde contained in the resin adhesive produced by taking formaldehyde as a polymerization monomer can be released in the subsequent processes of coating curing, material forming and the like. The traditional latex paint inevitably uses aldehyde polymer as functional additives such as a dispersant, a film-forming agent and the like. In addition, formaldehyde can be added as a preservative in the production process of materials such as cloth curtain fur leather and the like. Survey statistics show that the indoor air quality of 80% of newly decorated families can not reach the national standard, and most of the indoor air quality is caused by the excessive formaldehyde. Therefore, formaldehyde has become a major source of pollution in indoor environments.

The latex wall paint is widely applied to decoration of inner and outer wall surfaces of buildings due to the characteristics of various colors, bright colors, stable performance, good weather resistance and the like, and the components of the latex wall paint generally comprise acrylic resin, polyvinyl alcohol, pigment, additive and the like. The common latex wall paint has no formaldehyde removal effect, so that the common latex wall paint which does not have the formaldehyde removal effect has stronger practical significance for safely removing formaldehyde.

Related patents and literature report spray-on formaldehyde elimination methods. For example, Chinese patent application No. 201310567823.8 discloses a method for preparing nano-scale titanium dioxide sol for eliminating formaldehyde, which comprises the following components, by weight, 20-60 parts of butyl titanate, 600-1000 parts of deionized water, 40-80 parts of glacial acetic acid, 3-7 parts of concentrated hydrochloric acid and 40-80 parts of absolute ethyl alcohol; chinese patent application No. 200410096091.X discloses a catalyst for an artificial board with low free formaldehyde emission, which comprises oxides, compounds containing NH4 group or NH2 group, strong acid weak base salt, oxidant and the like; chinese patent application No. 201710467922.7 discloses an aldehyde-removing sterilizing weather-proof environment-friendly latex paint and a preparation method thereof, wherein the raw materials comprise, by weight, 2-4 parts of polyvinyl alcohol, 0.2-0.4 part of sodium hexametaphosphate, 0.05-0.15 part of pyrethroid, 30-40 parts of acrylic acid copolymer emulsion, 1-2 parts of propylene glycol, 3-7 parts of hydroxyethyl cellulose, 20-26 parts of filler, 1-2 parts of composite processing aid, 2-3 parts of reinforcing functional additive, 10-14 parts of aldehyde-removing additive and 20-30 parts of deionized water; chinese patent application No. 201910120079.4 discloses a formaldehyde-removing paint and a preparation method thereof, and reports a formaldehyde-removing paint and a preparation method thereof, wherein the formaldehyde-removing paint comprises the following components in parts by weight: 5-10 parts of active carbon loaded nano TiO2 material, 3-5 parts of chitosan, 3-5 parts of rosin resin, 0.1-1 part of nano graphene and the like.

In the disclosed technical scheme for eliminating formaldehyde, a strong oxidant and a strong acid-base formaldehyde scavenger can corrode the surfaces of hardware and paint in the using process; some latex paints with aldehyde-removing and antibacterial effects are added with heavy metal oxides or pyrethroids harmful to human bodies and substances with poor water solubility and the like as aldehyde-removing active ingredients.

Disclosure of Invention

The invention provides a latex wall paint additive with formaldehyde removing effect and a preparation method thereof, and particularly relates to a latex wall paint additive taking hydroxypropyl trimethyl ammonium chloride chitosan and ethylene urea as formaldehyde removing active substances.

The purpose of the invention is realized as follows: a latex wall paint additive with formaldehyde removal effect comprises the following components in percentage by weight: 10-20% of hydroxypropyl trimethyl ammonium chloride chitosan, 3-7% of PEG-10000 (polyethylene glycol), 8-15% of ethylene urea, 0.1-1% of ammonium chloride and 57-78.9% of pure water.

In the present invention: the weight percentage of the hydroxypropyl trimethyl ammonium chloride chitosan is 10-20%, and the most preferable weight percentage is 15%.

In the present invention: 3-7% of PEG-10000 (polyethylene glycol), and most preferably 5%.

In the present invention: the ethylene urea is 8-15% by weight, most preferably 10% by weight.

In the present invention: the weight percentage of the ammonium chloride is 0.1-1%, and the most preferable weight percentage is 0.5%.

In the present invention: the pure water is deionized water, and the pure water accounts for 57-78.9% by weight.

The invention has the advantages that: the chitosan is a substance obtained by deacetylating chitin widely existing in the nature, has strong chemical reaction activity, and can be widely applied to the fields of biological medicine, chemical engineering, water treatment, metal extraction and the like. The side chain of the molecule of the chitosan contains a large amount of active amino, but the traditional chitosan can only be dissolved in some dilute inorganic acid or organic acid, which limits the application of the chitosan in the field of formaldehyde removal active substances to a great extent. The preferred hydroxypropyl trimethyl ammonium chloride chitosan of this patent is based on chitosan and carries on the particular molecular modification to get a kind of chitosan quaternary ammonium salt with better water-solubility as the functional mother nucleus, this compound is characterized in that: good solubility in acid and alkaline media, strong stability of the solution, good reactivity with formaldehyde, good wettability and film forming property. Meanwhile, in the invention, hydroxypropyl trimethyl ammonium chloride chitosan can be used as a carrier of active micromolecules, which is beneficial to the aldehyde removal efficiency of another aldehyde removal active agent substance, namely ethylene urea. The characteristics of the components enable the latex wall paint additive with the formaldehyde removing effect to have the advantages of high formaldehyde removing efficiency, good compatibility with water-based latex wall paint, no toxic or side effect on an original latex paint system and the like.

Detailed Description

The invention provides a latex wall paint additive with formaldehyde removing effect, which comprises the following components in percentage by weight:

10-20% of hydroxypropyl trimethyl ammonium chloride chitosan;

3-7% of PEG-10000 (polyethylene glycol);

8-15% of ethylene urea;

0.1-1% of ammonium chloride;

57-78.9% of pure water.

The weight percentage content of the hydroxypropyl trimethyl ammonium chloride chitosan is 10-20%, and the most preferable content is 15%.

The weight percentage content of the PEG-10000 (polyethylene glycol) is 3-7%, and the most preferable content is 5%.

The ethylene urea is present in an amount of 8-15% by weight, most preferably 10% by weight.

The weight percentage content of the ammonium chloride is 0.1-1%, and the most preferable content is 0.5%.

The pure water is deionized water, and the pure water accounts for 57-78.9% by weight. .